/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in 
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/Apache-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 *
 */


package com.tencent.angel.common.transport;

import com.tencent.angel.common.location.Location;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;

import java.util.concurrent.TimeoutException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.pool.PoolableObjectFactory;

/**
 * Netty channel pool factory.
 */
public class ChannelObjectFactory implements PoolableObjectFactory<Channel> {

  private static final Log LOG = LogFactory.getLog(ChannelObjectFactory.class);
  /**
   * server address
   */
  private final Location loc;

  /**
   * netty client bootstrap
   */
  private final Bootstrap bootstrap;

  /**
   * Create a new ChannelObjectFactory.
   *
   * @param loc       server address
   * @param bootstrap netty client bootstrap
   */
  public ChannelObjectFactory(Location loc, Bootstrap bootstrap) {
    this.loc = loc;
    this.bootstrap = bootstrap;
  }

  @Override public void activateObject(Channel channel) throws Exception {

  }

  @Override public void destroyObject(Channel channel) throws Exception {
    channel.close();
  }

  @Override public Channel makeObject() throws Exception {
    ChannelFuture connectFuture = bootstrap.connect(loc.getIp(), loc.getPort());
    int ticks = 10000;
    while (ticks-- > 0) {
      if (connectFuture.isDone()) {
        return connectFuture.channel();
      }
      Thread.sleep(10);
    }

    if (!connectFuture.isDone()) {
      throw new TimeoutException("connect " + loc + " timeout");
    } else {
      return connectFuture.channel();
    }
  }

  @Override public void passivateObject(Channel channel) throws Exception {

  }

  @Override public boolean validateObject(Channel channel) {
    return channel.isOpen();
  }
}
